Reactive disazo dyestuffs containing triazines

ABSTRACT

DYESTUFFS REPRESENTED BY THE GENERAL FORMULA:   2-(D-N(-R)-),4-(CL-),6-((4-(CL-),6-(D-N(-R)-)S-TRIAZIN-   2-YL)-N(-R1)-X-N(-R1)-)-S-TRIAZINE   WHEREIN D REPRESENTS A RADICAL OF THE AZONAPHTHALENE OR PHENYLAZO NAPHTHALENE SERIES WHICH CONTAINS AT LEAST THREE SO3H GROUPS, EITHER R AND R1 REPRESENT H OR SATURATED ALIPHATIC RADICALS HAVING UP TO 4 CARBON ATOMS, AND X REPRESENTS A BENZENE, DIPHENYLENE OR NAPHTHALENE NUCLEUS WHICH MAY CONTAIN SUBSTITUENTS OR AN ALIPHATIC RADICAL HAVING AT LEAST TWO CARBON ATOMS,   OR -N(-R1)-X-N(-R1)-   ARE VALUABLE REACTIVE DYESTUFFS FOR CELLULOSE PROVIDING A WIDE RANGE OF SHADES HAVING EXCELLENT FASTNESS TO WASHING AND TO LIGHT. THEY ARE NOTABLE FOR THE HIGH PROPORTION WHICH FIXES ON THE FIBERS, ESPECIALLY WHEN APPLIED FROM SALINE DYEBATHS.

United States Patent Oflice 3,647,778 Patented Mar. 7, 1972 3,647,778 REACTIVE DISAZO DYESTUFFS CONTAINING TRIAZINES Herbert Francis Andrew and Cecil Vivian Stead, Manchester, England, assignors to Imperial Chemical Industries Limited, London, England No Drawing. Filed Jan. 12, 1970, Ser. No. 2,390 Claims priority, application G/rfiegt Britain, Jan. 16, 196?,

Int. Cl. C09]: 62/08 U.S. CL 260153 Claims ABSTRACT OF THE DISCLOSURE Dyestuffs represented by the general formula:

N N DN-C/ C-NXNO/ or NXI|\I- represents 1,4-piperazinylene 1 R1 are valuable reactive dyestuffs for cellulose providing a wide' range of shades having excellent fastness to washing and to light. They are notable for the high proportion which fixes on the fibre, especially when applied from saline dyebaths.

This invention relates to new reactive dyestufi's primarily valuable for the colouring of cellulose textile materials.

According to the invention there are provided dyestulfs represented by the general formula:

wherein D represents a radical of the azonaphthalene or phenylazo naphthalene series which contains at least three SO H groups,

Either R and R represent H or saturated aliphatic radicals having up to 4 carbon atoms, and

X represents a benzene, diphenylene or naphthalene nucleus which may contain substituents or an aliphatic radical having at least two carbon atoms,

or N--XII I -represents 1,4-piperazinylene As examples of aliphatic radicals represented by R and R there may be mentioned alkyl groups of 1 to 4 carbon atoms, e.g. methyl, ethyl, and butyl, also hydroxyalkyl groups, e.g. fl-hydroxyethyl.

As examples of substituents which may be present in benzene or naphthalene nuclei represented by X, there may be mentioned methyl, chlorine, methoxy, carboxylic acid and sulphonic acid. As examples of aliphatic radicals represented by X, there may be mentioned ethylene,

1:2-propylene, 1:3-propylene, 1:4-butylene, ethylaminoethylene and hexamethylene.

As examples of radicals represented by D, there may be mentioned phenylazo naphthyl in which the NR group is attached to a carbon atom of the benzene or naphthalene nucleus; azo naphthalene in which the NR group is attached to a carbon atom of one of the naphthalene nuclei; phenylazonaphthalene and azonaphthalene in which the NR group is attached to an anilino or benzoylamino group pendant on a naphthalene nucleus.

Apart from the substituents already mentioned, the benzene and naphthalene nuclei in D can contain a wide variety of substituents, e.g. OH, CO H, NHCOCH The radical D must contain at least three sulphonic acid groups. Although in general it is preferred that D should contain only the NR group depicted in Formula 1, there are circumstances in which a second NR group can be present, e.g. where the second NR group is o and p to sulphonic acid groups and hence is inert to acylation, e.g. as in l-amino-8-napbthol-2,4-disulphonic acid.

A preferred class of dyestuffs is that in which the linking group X is phenylene, sulphophenylene or disulphodiphenylene and D-NR is the radical of a phenylazo naphthalene compound containing a NHR group and three sulphonic acid groups, e.g. DNR represents a radical of the formula:

in which the naphthalene nucleus contains two or, preferably three sulphonic acid groups and the benzene nucleus can be further situated e.g. by one or more methyl, methoxy, acetylamino and/or ureido groups, or by at least one sulphonic acid group if the naphthalene nucleus contains less than three; or a radical of the formula:

on i gawk. 3)

wherein the naphthalene nucleus contains at least one and preferably two sulphonic acid groups and the benzene nucleus can be substituted e.g. by one or more methyl, methoxy, acetylamino and a suflicient number of sulphonic acid groups to bring the total to three.

A further preferred class of dyestuffs is that in which the group X is phenylene and D-NR is the radical of an azonaphthalene compound having 4 sulphonic acid groups, more especially a radical of the formula:

in which each naphthalene nucleus contains two sulphonic acid group, above all, where the NR group is in the 8- position of the naphthalene nucleus and the other naphthalene nucleus is a l-sulpho-naphth-2-yl radical having a second sulphonic acid group in one of the 5 to 8 positions.

Such dyestuffs are distinguished by their value for use in textile printing and in dyeing by exhaustion methods, in which they ofifer a degree of fixation over a wide range of liquor-to-goods ratio not possessed by commerciallyavailable reactive dyestuffs. At the same time, the new dyestuffs provide shades of very good light fastness,

whereas previously known dyestuffs of similar structure are usually deficient in this property.

The invention also provides a process for manufacture of the new dyestutfs which comprises condensing together two molecular proportions of cyanuric chloride, two molecular proportions of an aminoazo compound of formula DNHR where D and R have the meanings stated above and one molecular proportion of a diamine of formula:

wherein R and X have the meanings stated above.

The above process can conveniently be carried out by stirring a suspension of the cyanuric chloride in an aqueous medium with the aminoazo compound at a temperature of to C. until one chlorine atom of the cyanuric chloride has been replaced by the radical of the dyestuff, then adding the diamine and continuing reaction at a slightly higher temperature, usually in the range to C. until a second halogen atom on the triazine nucleus has reacted with each amino group. Alternatively, the cyanuric chloride can be reacted first with the diamine at the lower temperature to form a bis(dichlorotriazine) derivative and then with the aminoazo compound at the higher temperature. The condensations are preferably carried out at a pH of from 4 to 7, adding an acid-binding agent to neutralise the hydrochloric acid as it is liberated during the reaction. When the reaction is complete the new reactive dyestuffs can be isolated by the usual techniques adopted for isolation of water-soluble reactive dyestuffs, for example, by salting out and filtration, or by spraydrying the reaction mixture in which the dyestutf has been formed. If desired, s'tabilisers, for example, alkali metal hydrogen phosphates, can be added.

As examples of diamino compounds of Formula 4 which may be used there may be mentioned:

1 :3-diamin0benzene,

1 :4-diaminobenzene,

1:4-diaminobenzene-Z-sulphonic acid,

1 z3-diaminobenzene-4-sulphonic acid,

1 :4-diaminobenzene-Z-carboxylic acid,

2:6-diaminotoluene-4-sulphonic acid,

2:4-diaminotoluene-G-sulphonic acid,

2--methyl-l :4-diaminobenzene,

6-methyl-1 :3-diaminobenzene,

6--methyl-l :3-diaminobenzene-4-sulphonic acid,

1-methylamino-4-aminobenzene-2-sulphonic acid,

l--n buty1amino-4-arninobenzene-2-sulphonic acid,

4 4'-diamino-1 l'-diphenyl-2 2'-disulphonic acid,

4:4-diamino-3 :3'-dimethyl-1 l'-diphenyl-2 :2-

disulphonic acid,

4:4"diamino-l l-diphenyl-3-sulphonic acid,

l:3-diamino-2:4z6-trimethylbenzene-5-sulphonic acid,

2: G-diaminotoluene-4-sulphonamide,

4:4'-diamino-l l'-diphenyl-3 3'-dicarboxylic acid,

l:4'-diamino-2:idimethoxybenzene,

4:4'-diamino-3 :3'-carboxymethoxy-l :l'-diphenyl,

ethylene diamine,

l :3-propylenediamine,

hexamethylene diamine,

1 :Z-propylenediamine piperazine,

1:4-diaminobenzene-2:S-disulphonic acid,

2-chloro-1 S-diaminobenzene and 2,6-diaminonaphthalenet,S-disulphonic acid.

As examples of aminoazo compounds which may be used there may be mentioned the following classes:

(i) Monoazo compounds of the formula:

OII

wherein D represents a sulphonated benzene or naphthalene radical which is free from NHR groups, the NHR group is preferably attached to the 6-, 7- or 8-position of the naphthalene nucleus, and which may contain a sulphonic acid group in the 5- or 6-position of the napthalene nucleus. Also in this class are to be considered the related dyestuffs in which the NHR group, instead of being attached to the naphthalene nucleus, is attached to a benzoylamino or anilino group which is attached to the 6-, 7- or 8-position of the naphthalene nucleus.

Particularly valuable dyestuffs are obtained from those wherein D represents a sulphonated phenyl or naphthyl radical which contains a SO H group in ortho position to the azo link; the phenyl radical may be further substituted for example, by halogen atoms such as chlorine, alkyl radicals such as methyl, acylamino groups such as acetyl-amino and alkoxy radicals such as methoxy.

(ii) Monoazo compounds of the formula:

wherein D stands for a radical as defined for class (1) containing 2 sulphonic acid groups and D is a sulpho-l :4- naphthylene radical; the benzene nucleus in D, may contain further substituents such as halogen atoms, or alkyl, alkoxy, carboxylic acid and acylamino groups.

(iii) Monoazo compounds of the formula:

wherein D represents a radical of the benzene or naphthalene series, and K represents the radical of a naphthol mono-, dior tri-sulphonic acid having the OH group 0- to the azo group, D and K together containing at least 3 sulphonic acid groups. D preferably represents a radical of the benzene series containing a sulphonic acid group.

As examples of compounds of classes (i) to (iv) there may be mentioned the following:

In class (i):

8-amino-l-hydroxy-2-(2-sulphophenylazo)naphthalene- 3z6-disulphonic acid,

7-amino-2-(2:5-disulphophenylazo)-1-hydroxynaphthalene-3-sulphonic acid,

S-amino-l-hydroxy-Z: 2'azonaphthalene-1': 3 :5-

trisulphonic acid,

6-amino-1-hydroxy-2 :2'-azonaphthalene-l',3,5'

trisulphonic acid,

8-(3-aminobenzoylamino)-l-hydroxy-2-(2'-sulphophenylazo) -naphthalene-3 6-disulphonic acid,

S-aminol -hydroxy-2 2'-azonaphthalene-l 3 :5 '-6- tetrasulphonic acid,

8-amino-1-hydroxy-2: 2'-azonaphthalene-1' 3 6- trisulphonic acid.

In class (ii):

l-amino-4-(3':6:8'-trisulphonaphth-2'-ylazo)- naphthalene-6- (and 7-) sulphonic acid,

1-amino-4-(4' 8 '-disulphonaphth-2-ylazo naphthalene-6- (and 7-) sulphonic acid,

l-amino-4-(3' 6' 8-trisulphonaphth-2'-ylazo naphthalene-S-sulphonic acid. In class (iii):

2-( 4'-amino-2'-ureidophenylazo) naphthalene-3 :6 8-

tri-sulphonic acid,

2- 4'-amino-2'-acetylaminophenylazo naphthalene 3 6 8-trisulphonic acid,

In class (iv):

S-acetylamino-1-hydroxy-2-( 3'-amino-4'- sulphophenylazo)naphthalene-3 6-disulphonic acid,

8-phenylamino-l-hydroxy-2-(4'-arnino-2-sulphophenylazo naphthalene-3 6-disulphonic acid,

8-benzoylamino-l-hydroxy-Z-(5'-arnino-2'- sulphophenylazo)naphthalene-3 z6-disulphonic acid.

The above process is illustrated by the following ex amples in which parts are by weight:

EXAMPLE 1 To a solution of 18.9 parts of the trisodium salt of 2[4' (2":4" dichloro-l:3:S-s-triazin-6-ylamino)2'- acetylamino-phenylazo]naphthalene 316:8 trisulphonic acid (prepared by condensing equimolar proportions of cyanuric chloride and 2-(4-amino-2-acetylaminophenylazo)naphthalene-3,6,8-trisulphonic acid as described in British patent specification No. 970,475) in 400 parts of water, there is added a solution of 4.8 parts of the disodium salt of 4:4-diaminodiphenyl-2:2'-disu1phonic acid in 150 parts of water. The mixture is stirred at 4045 C. for 3 hours the pH being maintained at 7 by the addition of a 10% aqueous solution of sodium carbonate. The mixture is treated with 75 parts of salt, filtered, and the residue on the filter is then dried.

The dyestuif composition so obtained contains 1 atom of hydrolysable chlorine per azo group present. When applied to cellulose textile materials in conjunction with a treatment with an acid-binding agent, the dyestuif yields reddish-yellow shades having very good fastness to washing and to light.

EXAMPLE 2 A neutral solution of 3.1 parts of the disodium salt of water is added to a stirred mixture of 3.7 parts of cyanuric chloride, parts of acetone parts of ice and 40 parts of water. The mixture is stirred for 1 hour at 05 C., then neutralized to pH 7 by the addition of a 10% aqueous solution of sodium carbonate. A solution of 12.4 parts of the trisodium salt of 2 amino-S-hydroxy- 2'16-azonaphthalene-l:5:7-trisulphonic acid in 200 parts of water is added and the mixture is heated for 3 hours at 50 C., the pH being maintained at 7 by the addition of a 10% aqueous solution of sodium carbonate 40 parts of sodium chloride are added, the mixture is filtered and the residue on the filter is then dried.

The dyestuff composition so obtained contains 1.4 atoms of hydrolysable chlorine for each azo group present. When applied to cellulose textile materials in conjunction with a treatment with an acid-binding agent, the dye yields reddish-orange shades having good fastness to washing and to light.

The following table gives the shades of further new dyestuffs of the invention which are obtained as described in Example 1 or 2 by condensing together one molar proportion of the diamine named in column 3, two molar proportions of cyanuric chloride and two molar proportions of the amino compound named in the second column of 1,4-diaminobenzene-2,S-disulphonic acid in parts 25 of the table.

'DABLE I Example Amino compound Diamine s 3 744"amtno-2'-acetylaminophenylazolnaphthelem-3,6,8- 1,4-diamlnobenzene-2-sulphonlcacid Redrlish yellow,

trisulphonie acid. 4 do 2,fi,diamillotolucneA-sulphonic acid 5 .do 4,4 3;amin0-3,3dimathyl-1,1-diphcnyl-2,2'-disulphonic Do.

an 0 2-[4-amin02'-ureid0phenylazo]-naphthalenc-3,fi,8e 4,4-diamino-l,l-diphenyl-2,2'-disulphonic acid n trisulphonic acid.

1,3-diaminober\zene-4sulph0nic acid Do. 2.64liaminotoluane-4-sulphonie avid Do. 1,4-diaminohenzene3-sulphonic aci ])o. 1,4-diamibenzone D0. 11 d0 1,3-diaminobenzene Do. 12 2 [4' amin -2-a,cetylaminophenylaz0]naphthalene-3,6,8- 6n1ethyl-l,3diun1inob9nzcne D0.

trisulplwnic acid. 13 Z-methyl-l,4-diaminobenzena Do.

14 2,4-diarninotoluenc-fisulphonic acid Do. 15 Z-N-met 4,4'-diamino-i,l-diphenyl-2,2'-disulphonic acid Reddish orange,

azonaphthalene. 16 ..do 4,4 5;amino-3,3-dimethyl-1,l diphenyLlT-disuiphonie Do.

an 17 do 2,fi-diaminotoluene4-sulphonic acid D0. 1 do Dianisidine D 19 do 1,3-diaInin0benze|1e-4,6-disulphonic acid. D 20 do 4,4-diamino-l.l-diphenyl-3-su]phonic acid. Do. 2L "do" 2,6-diaminonaphthalene-4,8-disulphonic acid. D0. 22 do m-Phenyienn diamine Do. 23 2-(4-amin y2"acetylaminophenylazo)napltthalcnc4,6,8- 2.6-diaminotoluenc-t-sulphonic acid Reddish yellow,

trisulphonic acid. 24 do 4,4'-f2iifiXl10ll0-3,3"diHlQLhYl-l,Y-diphellyl-2,2'-dl5l1lph0nlc Do.

an 25 do ni-Phenylcne diamine D 2 2-(4-amino-2-acetylamin0phenylaz0)naphthale11e-4,fi,8- 1,3-diami110 23,6-trimet,hylbenzene-5-sulphonic 3nd,, I)

trlsulphonic acid. 27 244-amino-2-ureidophenylazo)naphthalene4,6,8-tri- 4,4'-diamino-1,1-diphenyl-2,2'-disulphonic acid D sulphonic acid. 28 do p-Phenylene diamine D0, 29 2-(4-amino-2-ureidophenylazo)naphthalene-3,6,8-tri- 1,4-diaIni1iobenzcrre-Zjdisulphonic acid ])0 sulphonic acid. 30 d0 1.3-(1i2m1i(i-2,4,6-tl'imethylbenzene-fi-sulphonit acid D0. Ethylene diamine D aj-dlaminobenzoic acid Do. 3,5 diaminobm1z0ic acicL. Do. 4-amino-N-nietliylaniline- -sulphon1c acid Do. t 4-amindN butyl aniline2-sulphonic acid. Do. Hexamethylene diamine 1m. Propylene-1341mmine. D0. PropylenwLii-diaminefl 1J0. Piperazine.. Do. 40 2-(4'-amino- -met ylphenylazo)napl1tllalene 3,6,8 2,6-diaminotoluene4-sulphonic acid 1J trisulphonie ael 41 do p-Pht-nylcne diamine D0. 42 Z(4-amino-5'-methoxy-2-methylplienylazoynaphthalcuem-Phenyleue diamine D0,

3,6.B-trisulphonic acid. 43 1amino-8-hydroxy-2',7 azonaphtha]ene-l-3,6-trisulphonic 1.4-phenylene diamine-2,6-disulphonic acid Bluish red.

acid. 44 lo LB-phenylene diamine 4-sulphonie acid Do. do 2,5-dlaniinohenzoic acid Do. o. m-Phenylene diamine D0, l-amino-S-hydroxy-2,7-azonaphthalene-l',3,5',tetra- D0.

sulphonic acid.

D0. Do. 1 -disulphonica Do. 51 l-amino-S-liydroxy-LZ,7'-az0naplithalene-l,4,5,6tetramPht'nylene diamine Do.

aulphonie acid. 62 8-benzoylamino-t hydroxy-Hfi amindphenylazo) 1,4-pl1enylenc diamine-Z-sulphonic acid Do.

naphthalene-2',3,6-trisulphonic acid. 53 S-aeetylamino-l-hydroxy-Q-(h'arninwphwylazo)uaplitha- ...do D0.

lene 2',3,fi-trisulphonie acid. 7 54 S-phenylmnino-l-hydroxy-2-(4'-a.mino-phenyl-az0) .do Navy blue.

naphthalene-Z,3 ti-trisulphonic acid.

TABLE I.--Con t:inued Example Amino compound Diamine Sh d 55 1,nmino-s-hydroxy-lphcnylazonaphthalene-2.3,6-tri- 1,4-phcnylcnc diaminc-Z-sulphonie acid Red,

sulphonic acid. 56 .do lmeraziue. Rod, H p-lllcnylentdiamina.

tiininosm y iiiiiiyitiibiili iiiiiiriii-ii zf'l' trisulphonic acid.

nidhcuylene diamine. l,ti-nuphtliyleno diamine-4,3-disulphon 2,6-diarninotoluci1c-4-sulphol11c acid 3,5-dia1ninobenzoic acid.U r, 4'aminolfllazonaphtlialclieAJ tLtrisulrJhQuIc arid .d

Do. Rr-drlisii yellow.

O licnyleue diamine The invention also provides a process for manufacture of the dyestuffs of Formula 1 in which R, R and X have the meanings stated above and D-NR- is the radical of a compound of th (aminophenylazo) naphthol or (aminonaphthylazo)r1aphthol series having at least 3 80 1i groups, which comprises condensing cyanuric chloride with one half-mole of a diamine of Formula 4 and with one mole of a phenyleneor naphthylene diamine to obtain a tetrazotisable aromatic diamine of the general formula:

ll NlI Ar Nu-o /(JANIIX N 2 (s) in which Ar represents a benzene or naphthalene nucleus, and tetrazotising this diamine of Formula 8 and coupling with two moles of a coupling component, the nucleus Ar and the coupling component together having at least 3 SO H groups.

As examples of phenyleneor naphthylenediamines which may be used, there may be mentioned 1,3-phenylene diamine-4-sulphonic acid, 1,4-phenylene diamine-2 sulphonic acid, 1,4-phenylene diamine-2,5-disulphonic acid, 1,4-naphthylene diamine-2-sulphonic acid.

As examples of naphthol coupling components which may be used, there may be mentioned naphthol sulphonic acids, and acylamino naphthol sulphonic acids, e.g. 2- naphthol-3,6-disulphonic acid, l-acetylamino8naphthol- 3,6- and -4,6-disulphonic acids, and l-benzoylamino-S- naphthol-3,6- and 4,6-disulphonic acids.

The condensation of the cyanuric chloride with the diamin of Formula 4 and the phenyleneor naphthylenediamine can be carried out in similar manner to the condensation of cyanuric chloride with the compound of formula DNHR and diamine of Formula 4, as described above. The tetrazotisation of the diamine of Formula 8 is conveniently carried out in aqueous acid medium, in the usual manner at as low temperature as possible, and the subsequent coupling is preferably carried out at as low a temperature and high a pH as will allow coupling to proceed efficiently, in order to keep side-reactions, e.g. hydrolysis of the chlorine atoms on the triazine nucleus, to a minimum.

The following examples are illustrative of this process:

EXAMPLE 64 An ice cold solution of 11.2 parts of the monosodium salt of 2,6-diaminotoluene-4-sulphonic acid in 200 parts of water is added, during 10 minutes, to an ice-cold suspension of 18.4 parts of cyanuric chloride in 200 parts of water and 100 parts of acetone. The pH of the mixture is maintained at 5-6 and finally raised to 7 by the addition of 100 parts of a N solution of sodium hydroxide over 30 minutes. A solution of 21 parts of the monosodium salt of 1,3-diaminobenzene-4-sulphonic acid in 200 parts of water is then added and the mixture is heated to 35 C. and maintained at 354U C. for 4 hours whilst a further 100 parts of a N solution of sodium hydroxide is added to maintain the pH at 6-7.

The resulting solution is cooled below 5 C. and 25 parts of concentrated hydrochloric acid are added, followed immediately by 50 parts of a 2 N solution of sodium nitrite. The mixture is stirred for 1 hour and the slight excess of nitrous acid is then destroyed by the addition of a small amount of sulphamic acid.

A solution of 36.5 parts of the disodium salt of lbenzoylamino-8-naphthol-3,6-disulphonic acid in 400 parts of water is added to the suspension of diazonium salt and the pH is slowly raised to 7 and maintained at this for 2 hours by the addition of a solution of sodium carbonate.

The resulting azo compound is precipitated by addition of 260 parts of sodium chloride, filtered off and dried. When applied to cellulosic textile materials in conjunction with an acid binding agent it yields bluish red shades of excellent fastness to light and wet treatments.

Table II gives further examples of bluish-red dyestufis of the invention which may be obtained by replacing the 11.2 parts of the monosodium salt of 2,6diaminotoluene- 4-sulphonic acid by the corresponding amount of the compound listed in Column H and replacing the 36.5 parts of the disodium salt of 1-benzoylamino-8-naphthol-3,6-disulphonic acid by the corresponding amount of the compound listed in Column III.

TABLE [I I If I[[ Disodlum salt m'4,4-di- Disodlum salt of 2-naplitholuminodlphcn 'l 2- 6,8-disulphonic acid.

disulpllonlc a 66 ..do Disodium salt of l-acetylamiito-Saiaphth0145,6- disulphonic acid.

dkimono-2,4,6-trimcthrl- 6,8disulph0ulc acid. henzene-fi-sulphonic acid.

The invention also provides a process for manufacture of the dyestuffs of Formula 1 in which R, R and X have the meanings stated and D-NR-is the radical of a compound of the phenylazo(aminonaphthol) or naphthylazo- (aminonaphthol) series having at least 3 80 1-1 groups, which comprises condensing cyanuric chloride with an equimolecular proportion of an aminonaphthol, and with one-half molecular proportion of a diamine of Formula 4, and coupling the resultant product with two moles of a diazotised amine of the benzene or naphthalene series.

The above process can conveniently be carried out in aqueous medium; condensation of the aminonaphthol and the cyanuric chloride is preferably carried out at a temperature of 0-5 C. and at a pH of from 3 to 6, dependent on the particular aminonaphthol used, to prevent interaction between the cyanuric chloride and the hydroxyl group of the aminonaphthol. Reaction of the diamine with the dichloro-s-triazine compound is preferably carried out at a temperature of from 30 to C. and at a pH of from 4 to 7, adding an acid-binding agent to neutralise the hydrochloric acid as it is liberated during the reaction.

If desired, reaction of the cyanuric chloride with the diamine can be carried out first, preferably at 0-5 C. and

pH 5-7 and the subsequent reaction with the amino- The above process can conveniently be carried out in naphthol is then carried out preferably at from 30 to 50 aqueous medium; condensation of the aminonaphthol and C. and ata H of 7, the cyanuric chloride is preferably carried out at a tem- The subsequent coupling step is preferably carried out perature of -5 C. and at a pH of from 3 to 6, dependat a temperature from 0 to C. and at as low a pH as cut on the particular aminonaphthol used, to prevent inis possible for efficient coupling to minimise hydrolysis teraction between the cyanuric chloride and the hydroxyl of the chlorine atoms on the triazine ring. group of the aminonaphthol. The subsequent coupling The following examples are illustrative of this process. step is preferably carried out at a temperature from 0 to 5 C. and at as low a pH as is possible for efficient EXAMPLE 70 in coupling to minimise hydrolysis of the chlorine atoms on the triazine ring. When coupling is complete, the prod- A Solution of P3115 0f the disodmm Salt of uct can be isolated and purified if desired before reaction fimihO-3-haPhlh01'3ifi-disulphhhic acid in 500 P of with the diamine of Formula 4, but usually the diamine ice cold water is add d d g minutes, to an ice-Cold, can be added to the mixture without an intermediate Stirrfid, Suspension of Parts Of Cyahllfic Chloride in 15 purification. Reaction of the diamine with the dichloro- 100 Parts of acetone and 200 Parts of Watfir- The mlxhlre s-triazine compound is preferably carried out at a temis stirred below 5 C. for 1 hour, then a solution of 5. 4 perature f f o 30 to 50 C and at 3 PH of f 4 Parts of m-phehylehe diamhle in 100 Parts of Water 15 to 7, adding an acid-binding agent to neutralise the hyadded and the mixture s at at for 4 hours drochloric acid as it is liberated during the reaction.

the P being maintained at hhout 4 y the addition f a no The following examples are illustrative of this process: 2 N aqueous solution of sodium carbonate. A suspension in 250 parts of ice cold water of the diazonium salt pre- EXAMPLE 5 pared in the usual manner from 30.3 parts of 2 naphthyl- A solution of 36.3 parts of the disodium salt of lamine-1:5-disulphonic acid is added to the above mixture amino-8-naphthol-3,6-disulphonic acid in 500 parts of ice and pH is adjusted to 6 by the addition f 2N d um cold water is added during 15 minutes, to an ice-cold. carbonate solution. The mixture is stirred for a further tirr d suspension of 18.4 parts of cyanuric chloride in 3 hours and is then treated with 40 parts of sodium Chlo 100 parts of acetone and 200 parts of water. The mixture ride. The precipitated compound is filtered Off and is then is tirred at 0-5 C for 1 hour and a suspgnsign, in 250 dried. parts of water, of the diazonium salt prepared in the usual The dyestuff so obtained, when pp to cellulosic manner from 30.3 parts of 2 naphthylamine-l:5-disult xt materials in PIE-561166 Of an acid binding agent Yifilds phonic acid is then added. The mixture is stirred whilst bluish red shadeshaving excellent fastness to light and wet a 2 N l ti f di carbonate l l dd d to treatments. raise the pH to 6 over 45 minutes, and stirred at this pH The following Table III gives further examples of dyef r a fu h 2 h rs, stufi's of the invention which are obtained by condensing 94 parts of the disodium Salt of 4;4' -1; cyamll'ic Chloride successively with 1 molehhlal' P P dipheny1-2:2disulphonic acid are added and the mixture ti n of the EIIHiIIO-HZRPI'XthOl sulphol'lic acid hamcd in tha is heated to C. stirred for 3 hours at 45-50 C. whilst third c lumn a With One-half molecular PTOPQFtiOH Of a 2 N solution of sodium carbonate is added as required the diamine nam in t fourth Column and Coupling to maintain the pH between 5 and 6. 300 parts of sodium the compound so obtained with one molecular proportion 40 chloride are then added and the precipitated dyestufl filof the diazonium salt of the amine named in the 2nd tered off and dried. The dyestutf thus obtained when apcolumn of the table. plied to cellulosic textile materials at elevated tempera- TABLE III Example Amine Aminonaphthol sulphonic acid Dimnine Shade 71 Aniline-2,5-disulphonic acid 2-methylarnin0-5-naphthol-7- 2,6-diamln0toluene-4-sulphonic acidm, Orange red,

sulphonic acid. 72 Orthanilic acid l-mrigio-ts-naphthot-3,6-disulphonic m-phenylene diumlne Red.

3,5-diarninobenzoic acid Red. 4,4'-dinmino-l,I-diphenyl- 2 Red.

dislulphonic acid.

75 Lmethylaniline-Q-sulphonic acid e. Red. 76 Ant!inc-2,5-disulphonic acid ..do m-Phenylene diaminonn Rod. 77 2-naphthylarnine-4,S-disulphonic acid do. d0 Bluisll red. 78 2-naphthylamine-1,5-disulph0nic acid do. 3,5-diamin0hcnzoic acid Do. TSL do .do 2,fihtaminot0luene-4-sulphonic acid, Do. 80. Aniltne-lddisulphonic acid 2-a1uino-5-naphthol-7-sulphonic acid d0 Orange. 81 2-naphthylan1ine-1,b-disulphonic acid .r10 -amino-N-methylanilincQ-B- Rt-(ldish orange.

sulpho cacid. 82... do .d0 3,5-diaminobl'nzoic acid." Rvddi. 1 orange. 83 ..do .do 4,4'-diarnino-1:1-diplit-nyl- ,3"- no.

disulphonic acid. 84 .do l-anfijno-S-uaphthol-4,6-disulphonic m-phcnylcne (liaminr Bluish rod.

The invention also provides a process for manufacture ture in the presence of an acid binding agent yields bluish of the dyestufls of Formula 1 in which R, R and X have red shades of excellent fastness to light and wet treatthe meanings stated and D-NR is the radical of a ments. compound of the phenylazo(aminonaphthol) or naphth- The following Table IV gives further examples of dyeylazo(aminonaphthol) series having at least 3 SO H stuffs of the invention which may be obtained as described groups, which comprises condensing cyanuric chloride in the previous example by coupling the N-2':4'-dichlorowith an equimolar proportion of an aminonaphthol, cou- 7O s-triazin-6'-yl derivative of the aminonaphtholsulphonic pling the resultant product with a diazotised amine of acid named in the third column with the diazonium salt the benzene or naphthalene series and condensing two of the amine named in the second column and reacting moles of the resultant product with one mole of a di- 1 molecular proportion of the dichlorotriazinyl comamine of the general Formula 4, the aminonaphthol and pound so obtained with half a molecular proportion of amine together containing at least 3 SO H groups. the diamine named in the fourth column of the table.

TABLE IV Amine Aminonaphthol sulphonic acid Diamlne Shade Orthanilic acid i-aniilno-8-naphthol-Bfi-disulphonlc 1,3-dlaminobenzene-... Red.

4-Inethylanlline-2sulphonic aeirL. 2-naphthylamine-1,5-disuiphonie act 2,6-diaminotoluene-4-sulphonic acid--- Red.

do d0. 1,4diaminobenzene Do. Aniline-2,5-disulphonic acid 2-a1nino-5-naphthol-T-sulphonic acid... 4,4-diamino-1,l'dlphenyl-2,2'- Orange.

dlsul phonic acid. 91 2-naphthylamine-1,fi-disulphonie acid- 2Ngrieghylagnino-fi-naphthol 7-sul 2,6-diaminobenzoic acid Reddish orange.

p 011 C 80 92 do Lamino- -naphth0l-4,ti-disulphonic LB-dlamlnobenzene D0.

acid. 93 Aniline-2,5-disulphonic acid 2NEnethylagiino-5-naphtholJ-sul 2,6-diam1not0luene-4-sulphonie acid-.. Orange.

p onic ac 94., Aniline-2,4-disulph0nic acid 2-amino-5-naphthol-7eu1ph0nic acid... 3,5-diaminobenzoic acid D0. 95 Aniline 2,5-disulphonic acid 0 ZfldiaminotolueneA-sulphoniu acid Do. 96 Aniline-2,4hisulphonic acid 2-N-methyl-amin0-5-naphth0l-7- 3,6-diaminobcnzoic acid Do sulphonic acid.

The invention also provides a process for manufacture of the dyestuffs of Formula 1 in which R, R and X have the meanings stated above and DNR is the radical of a compound of the (aminophenylazohaphthol or (aminonaphthylazo)naphthol series having at least 3 $0 11 groups, which comprises condensing cyanuric chloride with one molar proportion of a phenyleneor naphthylene-diamine, diazotising the mono-amino compound so obtained and coupling with a naphthol coupling component and condensing two molecular proportions of the resulting compound of formula:

of the disodium salt of 2,6-diamino-naphthalene-4,8-disulphonic acid in 200 parts of water is added and the mixture is heated to 35 C. and stirred at this for 4 hours whilst maintaining the pH at 6-7 by the addition of 100 parts of N sodium hydroxide solution.

260 parts of sodium chloride are then added and the precipitated dyestuff filtered 01f and dried. When applied to cellulosic textile materials in conjunction with an acid binding agent it yields bluish red shades of excellent fastness to light and wet treatments.

The following Table IV gives further examples of dyestuffs of the invention which are obtained when the 36.5

Cl ([3 parts of the disodium salt of l-benzoylamino-8-naphthol- 30 3,6-disulphonic acid and 18.1 parts of the disodium salt N N of 2, 6-diaminonaphthalene-4,8-disulphonic acid are rel Q3431 placed by the appropriate amounts of the compounds I .17 listed in Columns II and III. Column IV lists the shade N obtained.

TABLE IV I II IlI iv 98 Disodium salt of 4,4-diamino-3.3'-dimethyldipl1enyl-li,6'disul- Disodium salt of S-acetylurninod-naphl.hol-3,6disulphonic Bluish phonic acid. acid. red. 99 pi di m salt of 2,6-diamtnonaphtholene-4,8-disulph0nic acid do D0. 1(]0 do Disodium salt of 2-uaphthol-3,6-disulplionic acid D0. 101 do Dlsodium salt of Z-naphthylamine-5,7-disuiph0niu 21nd,." Orange.

with one molecular proportion of a diamine of Formula 4.

The above process can conveniently be carried out in aqueous meduim, the condensation being carried out, in general, at 0-10 C. for replacement of the first chlorine atom of the cyanuric chloride and at 30-50 C. for replacement of the second chlorine atom. In general, the condensations should be carried out at a pH of 4 to 7, adding an acid-binding agent to neutralise the hydrochloric acid as it is liberated during the reaction. The couplings should be carried out at as low a temperature and as low a pH as will operate efiiciently to avoid hydrolysis of chlorine from the triazine nucleus.

The following example and table illustrate the above process.

EXAMPLE 97 An ice cold solution of 21 parts of the monosodium salt of l,3-diaminobenzene-4-sulphonic acid in 200 parts of water is added slowly to an ice-cold suspension of 18.4 parts of cyanuric chloride in 200 parts of water and 100 parts of acetone. The mixture is stirred at 05 C. for 1 hour and the pH of the suspension is then raised to 6 by the addition of 100 parts of a N solution of sodium hydroxide. 50 parts of a 2 N solution of sodium nitrite is then added, followed immediately by 25 parts of concentrated hydrochloric acid. The suspension is then stirred for 1 hour at 0-5 C., then the slight excess of nitrous acid is destroyed by addition of sulphamic acid. A solution of 3 6.5 parts of the disodium salt of l-benzoylarnino- 8-naphthol-3,fi-disulphonic acid in 400 parts of water is added and the pH of the mixture is raised to 7 by the addition of further N sodium hydroxide solution and maintained at this pH for 1 hour. A solution of 18.1 parts The new reactive dyestuffs are valuable for colouring cellulose textile materials, for example, textile materials comprising natural or regenerated cotton. For colouring such materials, the new dyestuifs are preferably applied, either by a printing but preferably a dyeing process, to the cellulose textile material in conjunction with a treatment with an acid-binding agent, e.g. caustic soda, sodium carbonate, phosphate, silicate or bicarbonate, which may be applied to cellulose textile material before, during or after the application of the dyestutf. When so applied, the new dyestuffs react with the cellulose and yield shades possessing excellent fastness to washing.

We claim:

1. A disazo dyestuii having the formula wherein Np represents a member selected from the group consisting of naphthyl substituted with l-3 sulphonic acid groups and naphthyl substituted with l-3 sulphonic acid groups and a member selected from the group consisting of OH, "NHZ, anilino, acetylamino and benzoylamino, the maximum number of substituents being 4; Ar is selected from the group consisting of benzene, benzene substituted with l-Z members selected from the group consisting of NHCOCH NHCONH -CH -OCH SO H, naphthylene substituted with 1-2 SO H groups and --OH; Np and Ar together containing 3-4 -SO H groups; R represents a member selected from the group 4. A dyestuff as claimed in claim 1 having the forconsisting of hydrogen and lower alkyl; mula:

NR -XNR l 5. A dyestulf as claimed in claim 1 having the forrepresents N, N'-piperazylene or a diamine wherein R is mula: selected from the group consisting of hydrogen and lower cl alkyl and X is selected from the group consisting of phen- I so it on c ylene, sulphophenylene, disulphophenylene, tolylene, 5111- 3 N N photolylene, n'imethylsulphophenylene, carboxyphenylm 3 ene, disulphonaphthalene, sulphodiphenylene, disulphodi- Ho 5 my \N//C\NH phenylene, dimethoxydiphenylene, disulphodimethyldiso H 5 CH phenylene, ethylene, propylene, trimethylene and hexa- 3 5 methylene. NH

2. The dyestufi of claim 1 having the formula:

5 N CL HO 5 NH 0 NA HCOCH 0 H w m II I N=N so l! on NILLM\NH H0 5 50 3. References Cited UNITED STATES PATENTS N- N \NK I/ \C/ H 110 8 $03}! 2,768,158 10/ i956 Strobel et al. 260-153 l L JOSEPH REBOLD, Primary Examiner NHCOCHS 3 D. M. PAPUGA, Assistant Examiner US. Cl. X.R. 3. The dyestuff of claim 1 having the formula 260194, 195, 5 1.93 199, 2495, 2498 NHCONH 

